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Islip Weather in December, USA

Islip Averages December

ISLIP AVERAGES FOR DECEMBER

  • What is Average High Low Temperature?
    The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily

    High Temperature

    7°C
    45°F
  • What is Average High Low Temperature?
    The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily

    Low Temperature

    -2°C
    28°F
  • What is Average Rainfall?
    The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years

    Rainfall

    3 mm
  • What is Chance of Rain?
    This is based on historical weather data, how many days has it rained in the past during this month over a period of years of recorded weather

    Chance of Rain

    35 %
  • What is Chance of Snow Day?
    Based on historical weather data, this percentage is determined by the chance of snow for that month over a preiod of years

    Chance of Snow Day

    18 %
  • What is Chance of Sunny Day?
    By taking the maximum available sunny hours in a day (ie: from sunrise to sunset) and the actual sunhsine hours measured. So if there are 12 hours of daylight time and 6 hours of sunshine, it is 50%

    Chance of Sunny Day

    31 %
  • What is Chance of Windy Day?
    Taking historical wind data for a month at a certain threshold wind speed. Take the number of days the wind was above this threshold, and divide that by the days in the month to determine the chance of a windy day

    Chance of Windy Day

    41 %
  • What is Chance of Fog Day?
    Based on historical weather data, this percentage is determined by the chance of fog for that month over a preiod of years

    Chance of Fog Day

    14 %
  • What is Chance of Cloudy Day?
    This is based on the sunshine hours per day minus the daylight hours, if the sunshine hours are less than half of the daylight hours, it is labeled a cloudy day

    Chance of Cloudy Day

    36 %

Slide and Tap Other Months

Islip Daily Averages December

DAILY AVERAGES FOR DECEMBER

December 2024
Sun
1 Avg 43º
Mon
2 Avg 45º
Tue
3 Avg 39º
Wed
4 Avg 46º
Thu
5 Avg 45º
Fri
6 Avg 39º
Sat
7 Avg 36º
8 Avg 37º
9 Avg 37º
10 Avg 36º
11 Avg 39º
12 Avg 37º
13 Avg 37º
14 Avg 36º
15 Avg 32º
16 Avg 37º
17 Avg 39º
18 Avg 36º
19 Avg 36º
20 Avg 37º
21 Avg 46º
22 Avg 45º
23 Avg 45º
24 Avg 39º
25 Avg 37º
26 Avg 39º
27 Avg 36º
28 Avg 36º
29 Avg 32º
30 Avg -1º 30º
31 Avg -
Forecast
Avg Historical Daily Average